Chemical Engineering Mcqs

Thermodynamic equilibrium constant in a system is affected by___________________?

(A) Inerts
(B) Pressure
(C) Temperature
(D) All

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Sum of the powers of the concentration terms in the rate equation is called the _____________ of the reaction?

(A) Order
(B) Overall order
(C) Molecularity
(D) None of these

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The rate at which a chemical substance reacts is proportional to its _____________________?

(A) Active mass
(B) Molecular weight
(C) Equivalent weight
(D) Atomic weight

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Which of the following is the most suitable for isothermal operation?

(A) Batch reactor
(B) Back-mix reactor
(C) Plug-flow reactor
(D) Fixed bed reactor

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An exothermic reaction takes place in an adiabatic reactor. The product temperature ______________ reactor feed temperature?

(A) Is always equal to
(B) Is always greater than
(C) Is always less than
(D) May be greater or less than

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The rate of forward reaction, at chemical equilibrium is ______________ the rate of backward reaction?

(A) More than
(B) Less than
(C) Equal to
(D) Either

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For a first order chemical reaction, the rate constant_________________?

(A) Changes on changing the concentration units
(B) Is not a function of the unit of time
(C) Has unit of time-1
(D) None of these

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When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only _______________ the true value?

(A) Twice
(B) Half
(C) Equal
(D) None of these

Submitted By :Ali Uppal

____________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction ?

(A) Gas film diffusion
(B) Ash diffusion
(C) Chemical reaction
(D) None of these

Submitted By :Ali Uppal

If in the gaseous phase reaction, N2O4 ⇌ 2NO2, x is the part of N2O4 which dissociates, then the number of molecules at equilibrium will be___________________?

(A) (1 + x)
(B) (1 – x)
(C) (1 + x)2
(D) (1 – x)2

Submitted By :Ali Uppal

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